a.greybox {
    display:block;
    /*background:url(img/icons/aceitar.png);*/
    width:100px;
    height:20px;
}
#GB_overlay {
    background-image: url(img/greybox/overlay.png);
    position: fixed;
    margin: auto;
    top: 0;
    left: 0;
    z-index: 100;
    width:  100%;
    height: 100%;
}

* html #GB_overlay {
    background-color: #000;
    background-color: transparent;
    background-image: url(img/greybox/blank.gif);
    filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src="overlay.png", sizingMethod="scale");
}

#GB_window {
    top: 10px;
    left: 0px;
    position: absolute;
    background: #fff;
    border: 5px solid #aaa;
    overflow: auto;
    width: 400px;
    height: 400px;
    z-index: 150;
}

#GB_frame {
    border: 0;
    overflow: auto;
    width: 100%;
    height: 378px;
}

#GB_caption {
    font: 12px bold helvetica, verdana, sans-serif;
    color: #fff;
    background: #888;
    padding: 2px 0 2px 5px;
    margin: 0;
    text-align: left;
}

#GB_window img {
    position: absolute;
    top: 2px;
    right: 5px;
    cursor: pointer;
    cursor: hand;
}